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Financing Receivables (Details 6)
6 Months Ended 12 Months Ended
Jun. 30, 2011
Dec. 31, 2010
Financial Industry
   
Financing Receivables by Portfolio Segment    
Financing receivables (as a percent) 37.00% 36.00%
Government Industry
   
Financing Receivables by Portfolio Segment    
Financing receivables (as a percent) 16.00% 16.00%
Manufacturing Industry
   
Financing Receivables by Portfolio Segment    
Financing receivables (as a percent) 13.00% 14.00%
Retail Industry
   
Financing Receivables by Portfolio Segment    
Financing receivables (as a percent) 9.00% 9.00%
Services Industry
   
Financing Receivables by Portfolio Segment    
Financing receivables (as a percent) 8.00% 8.00%
Communications Industry
   
Financing Receivables by Portfolio Segment    
Financing receivables (as a percent) 5.00% 5.00%
Other industries
   
Financing Receivables by Portfolio Segment    
Financing receivables (as a percent) 12.00% 12.00%